/*
 * @brief Host mode driver for the library USB RNDIS Class driver
 *
 * @note
 * Copyright(C) NXP Semiconductors, 2012
 * Copyright(C) Dean Camera, 2011, 2012
 * All rights reserved.
 *
 * @par
 * Software that is described herein is for illustrative purposes only
 * which provides customers with programming information regarding the
 * LPC products.  This software is supplied "AS IS" without any warranties of
 * any kind, and NXP Semiconductors and its licensor disclaim any and
 * all warranties, express or implied, including all implied warranties of
 * merchantability, fitness for a particular purpose and non-infringement of
 * intellectual property rights.  NXP Semiconductors assumes no responsibility
 * or liability for the use of the software, conveys no license or rights under any
 * patent, copyright, mask work right, or any other intellectual property rights in
 * or to any products. NXP Semiconductors reserves the right to make changes
 * in the software without notification. NXP Semiconductors also makes no
 * representation or warranty that such application will be suitable for the
 * specified use without further testing or modification.
 *
 * @par
 * Permission to use, copy, modify, and distribute this software and its
 * documentation is hereby granted, under NXP Semiconductors' and its
 * licensor's relevant copyrights in the software, without fee, provided that it
 * is used in conjunction with NXP Semiconductors microcontrollers.  This
 * copyright, permission, and disclaimer notice must appear in all copies of
 * this code.
 */

/** @ingroup Group_USBClassRNDIS
 *  @defgroup Group_USBClassRNDISHost RNDIS Class Host Mode Driver
 *
 *  @section Sec_Dependencies Module Source Dependencies
 *  The following files must be built with any user project that uses this module:
 *    - LPCUSBlib/Drivers/USB/Class/Host/RNDIS.c <i>(Makefile source module name: LPCUSBlib_SRC_USBCLASS)</i>
 *
 *  @section Sec_ModDescription Module Description
 *  Host Mode USB Class driver framework interface, for the Microsoft RNDIS Ethernet
 *  USB Class driver.
 *
 *  @{
 */

#ifndef __RNDIS_CLASS_HOST_H__
#define __RNDIS_CLASS_HOST_H__

	/* Includes: */
		#include "../../USB.h"
		#include "../Common/RNDISClassCommon.h"

	/* Enable C linkage for C++ Compilers: */
		#if defined(__cplusplus)
			extern "C" {
		#endif

	/* Preprocessor Checks: */
		#if !defined(__INCLUDE_FROM_RNDIS_DRIVER)
			#error Do not include this file directly. Include LPCUSBlib/Drivers/USB.h instead.
		#endif

	/* Public Interface - May be used in end-application: */
		/* Type Defines: */
			/** @brief RNDIS Class Host Mode Configuration and State Structure.
			 *
			 *  Class state structure. An instance of this structure should be made within the user application,
			 *  and passed to each of the RNDIS class driver functions as the \c RNDISInterfaceInfo parameter. This
			 *  stores each RNDIS interface's configuration and state information.
			 */
			typedef struct
			{
				const struct
				{
					uint8_t  DataINPipeNumber; /**< Pipe number of the RNDIS interface's IN data pipe. */
					bool     DataINPipeDoubleBank; /**< Indicates if the RNDIS interface's IN data pipe should use double banking. */

					uint8_t  DataOUTPipeNumber; /**< Pipe number of the RNDIS interface's OUT data pipe. */
					bool     DataOUTPipeDoubleBank; /**< Indicates if the RNDIS interface's OUT data pipe should use double banking. */

					uint8_t  NotificationPipeNumber; /**< Pipe number of the RNDIS interface's IN notification endpoint, if used. */
					bool     NotificationPipeDoubleBank; /**< Indicates if the RNDIS interface's notification pipe should use double banking. */

					uint32_t HostMaxPacketSize; /**< Maximum size of a packet which can be buffered by the host. */
					uint8_t  PortNumber;		/**< Port number that this interface is running.
												*/
				} Config; /**< Config data for the USB class interface within the device. All elements in this section
				           *   <b>must</b> be set or the interface will fail to enumerate and operate correctly.
				           */
				struct
				{
					bool IsActive; /**< Indicates if the current interface instance is connected to an attached device, valid
					                *   after @ref RNDIS_Host_ConfigurePipes() is called and the Host state machine is in the
					                *   Configured state.
					                */
					uint8_t ControlInterfaceNumber; /**< Interface index of the RNDIS control interface within the attached device. */

					uint16_t DataINPipeSize; /**< Size in bytes of the RNDIS interface's IN data pipe. */
					uint16_t DataOUTPipeSize;  /**< Size in bytes of the RNDIS interface's OUT data pipe. */
					uint16_t NotificationPipeSize;  /**< Size in bytes of the RNDIS interface's IN notification pipe, if used. */

					uint32_t DeviceMaxPacketSize; /**< Maximum size of a packet which can be buffered by the attached RNDIS device. */

					uint32_t RequestID; /**< Request ID counter to give a unique ID for each command/response pair. */
				} State; /**< State data for the USB class interface within the device. All elements in this section
						  *   <b>may</b> be set to initial values, but may also be ignored to default to sane values when
						  *   the interface is enumerated.
						  */
			} USB_ClassInfo_RNDIS_Host_t;

		/* Enums: */
			/** Enum for the possible error codes returned by the @ref RNDIS_Host_ConfigurePipes() function. */
			enum RNDIS_Host_EnumerationFailure_ErrorCodes_t
			{
				RNDIS_ENUMERROR_NoError                    = 0, /**< Configuration Descriptor was processed successfully. */
				RNDIS_ENUMERROR_InvalidConfigDescriptor    = 1, /**< The device returned an invalid Configuration Descriptor. */
				RNDIS_ENUMERROR_NoCompatibleInterfaceFound = 2, /**< A compatible RNDIS interface was not found in the device's Configuration Descriptor. */
				RNDIS_ENUMERROR_PipeConfigurationFailed    = 3, /**< One or more pipes for the specified interface could not be configured correctly. */
			};

		/* Function Prototypes: */
			/** @brief Host interface configuration routine, to configure a given RNDIS host interface instance using the Configuration
			 *  Descriptor read from an attached USB device. This function automatically updates the given RNDIS Host instance's
			 *  state values and configures the pipes required to communicate with the interface if it is found within the device.
			 *  This should be called once after the stack has enumerated the attached device, while the host state machine is in
			 *  the Addressed state.
			 *
			 *  @param RNDISInterfaceInfo     : Pointer to a structure containing an RNDIS Class host configuration and state.
			 *  @param ConfigDescriptorSize   : Length of the attached device's Configuration Descriptor.
			 *  @param DeviceConfigDescriptor : Pointer to a buffer containing the attached device's Configuration Descriptor.
			 *
			 *  @return A value from the @ref RNDIS_Host_EnumerationFailure_ErrorCodes_t enum.
			 */
			uint8_t RNDIS_Host_ConfigurePipes(USB_ClassInfo_RNDIS_Host_t* const RNDISInterfaceInfo,
			                                  uint16_t ConfigDescriptorSize,
			                                  void* DeviceConfigDescriptor) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(3);

			/** @brief Sends a RNDIS KEEPALIVE command to the device, to ensure that it does not enter standby mode after periods
			 *  of long inactivity.
			 *
			 *  @param RNDISInterfaceInfo : Pointer to a structure containing an RNDIS Class host configuration and state.
			 *
			 *  @return A value from the @ref USB_Host_SendControlErrorCodes_t enum or @ref RNDIS_ERROR_LOGICAL_CMD_FAILED if the device returned a
			 *          logical command failure.
			 */
			uint8_t RNDIS_Host_SendKeepAlive(USB_ClassInfo_RNDIS_Host_t* const RNDISInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);

			/** @brief Initializes the attached RNDIS device's RNDIS interface. This should be called after the device's pipes have been
			 *  configured via the call to @ref RNDIS_Host_ConfigurePipes().
			 *
			 *  @param RNDISInterfaceInfo : Pointer to a structure containing an RNDIS Class host configuration and state.
			 *
			 *  @return A value from the @ref USB_Host_SendControlErrorCodes_t enum or @ref RNDIS_ERROR_LOGICAL_CMD_FAILED if the
			 *          device returned a logical command failure.
			 */
			uint8_t RNDIS_Host_InitializeDevice(USB_ClassInfo_RNDIS_Host_t* const RNDISInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);

			/** @brief Sets a given RNDIS property of an attached RNDIS device.
			 *
			 *  @param RNDISInterfaceInfo : Pointer to a structure containing an RNDIS Class host configuration and state.
			 *  @param Oid                : OID number of the parameter to set.
			 *  @param Buffer             : Pointer to where the property data is to be sourced from.
			 *  @param Length             : Length in bytes of the property data to sent to the device.
			 *
			 *  @return A value from the @ref USB_Host_SendControlErrorCodes_t enum or @ref RNDIS_ERROR_LOGICAL_CMD_FAILED if the
			 *          device returned a logical command failure.
			 */
			uint8_t RNDIS_Host_SetRNDISProperty(USB_ClassInfo_RNDIS_Host_t* const RNDISInterfaceInfo,
			                                    const uint32_t Oid,
			                                    void* Buffer,
			                                    const uint16_t Length) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(3);

			/** @brief Gets a given RNDIS property of an attached RNDIS device.
			 *
			 *  @param RNDISInterfaceInfo : Pointer to a structure containing an RNDIS Class host configuration and state.
			 *  @param Oid                : OID number of the parameter to get.
			 *  @param Buffer             : Pointer to where the property data is to be written to.
			 *  @param MaxLength          : Length in bytes of the destination buffer size.
			 *
			 *  @return A value from the @ref USB_Host_SendControlErrorCodes_t enum or @ref RNDIS_ERROR_LOGICAL_CMD_FAILED if the
			 *          device returned a logical command failure.
			 */
			uint8_t RNDIS_Host_QueryRNDISProperty(USB_ClassInfo_RNDIS_Host_t* const RNDISInterfaceInfo,
			                                      const uint32_t Oid,
			                                      void* Buffer,
			                                      const uint16_t MaxLength) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(3);

			/** @brief Determines if a packet is currently waiting for the host to read in and process.
			 *
			 *  @pre This function must only be called when the Host state machine is in the @ref HOST_STATE_Configured state or the
			 *       call will fail.
			 *
			 *  @param RNDISInterfaceInfo : Pointer to a structure containing an RNDIS Class host configuration and state.
			 *
			 *  @return Boolean \c true if a packet is waiting to be read in by the host, \c false otherwise.
			 */
			bool RNDIS_Host_IsPacketReceived(USB_ClassInfo_RNDIS_Host_t* const RNDISInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);

			/** @brief Retrieves the next pending packet from the device, discarding the remainder of the RNDIS packet header to leave
			 *  only the packet contents for processing by the host in the nominated buffer.
			 *
			 *  @pre This function must only be called when the Host state machine is in the @ref HOST_STATE_Configured state or the
			 *       call will fail.
			 *
			 *  @param RNDISInterfaceInfo : Pointer to a structure containing an RNDIS Class host configuration and state.
			 *  @param Buffer             : Pointer to a buffer where the packer data is to be written to.
			 *  @param PacketLength       : Pointer to where the length in bytes of the read packet is to be stored.
			 *
			 *  @return A value from the @ref Pipe_Stream_RW_ErrorCodes_t enum.
			 */
			uint8_t RNDIS_Host_ReadPacket(USB_ClassInfo_RNDIS_Host_t* const RNDISInterfaceInfo,
			                              void* Buffer,
			                              uint16_t* const PacketLength) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2)
			                              ATTR_NON_NULL_PTR_ARG(3);

			/** @brief Sends the given packet to the attached RNDIS device, after adding a RNDIS packet message header.
			 *
			 *  @pre This function must only be called when the Host state machine is in the @ref HOST_STATE_Configured state or the
			 *       call will fail.
			 *
			 *  @param RNDISInterfaceInfo : Pointer to a structure containing an RNDIS Class host configuration and state.
			 *  @param Buffer             : Pointer to a buffer where the packer data is to be read from.
			 *  @param PacketLength       : Length in bytes of the packet to send.
			 *
			 *  @return A value from the @ref Pipe_Stream_RW_ErrorCodes_t enum.
			 */
			uint8_t RNDIS_Host_SendPacket(USB_ClassInfo_RNDIS_Host_t* const RNDISInterfaceInfo,
			                              void* Buffer,
			                              const uint16_t PacketLength) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2);

		/* Inline Functions: */
			/** @brief General management task for a given RNDIS host class interface, required for the correct operation of the interface. This should
			 *  be called frequently in the main program loop, before the master USB management task @ref USB_USBTask().
			 *
			 *  @param RNDISInterfaceInfo : Pointer to a structure containing an RNDIS Class host configuration and state.
			 *	@return	Nothing
			 */
			static inline void RNDIS_Host_USBTask(USB_ClassInfo_RNDIS_Host_t* const RNDISInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1) ATTR_ALWAYS_INLINE;
			static inline void RNDIS_Host_USBTask(USB_ClassInfo_RNDIS_Host_t* const RNDISInterfaceInfo)
			{
				(void)RNDISInterfaceInfo;
			}

	/* Private Interface - For use in library only: */
	#if !defined(__DOXYGEN__)
		/* Function Prototypes: */
			#if defined(__INCLUDE_FROM_RNDIS_HOST_C)
				static uint8_t RNDIS_SendEncapsulatedCommand(USB_ClassInfo_RNDIS_Host_t* const RNDISInterfaceInfo,
				                                             void* Buffer,
				                                             const uint16_t Length) ATTR_NON_NULL_PTR_ARG(1)
				                                             ATTR_NON_NULL_PTR_ARG(2);
				static uint8_t RNDIS_GetEncapsulatedResponse(USB_ClassInfo_RNDIS_Host_t* const RNDISInterfaceInfo,
				                                             void* Buffer,
				                                             const uint16_t Length) ATTR_NON_NULL_PTR_ARG(1)
				                                             ATTR_NON_NULL_PTR_ARG(2);

				static uint8_t DCOMP_RNDIS_Host_NextRNDISControlInterface(void* const CurrentDescriptor)
				                                                          ATTR_WARN_UNUSED_RESULT ATTR_NON_NULL_PTR_ARG(1);
				static uint8_t DCOMP_RNDIS_Host_NextRNDISDataInterface(void* const CurrentDescriptor)
				                                                       ATTR_WARN_UNUSED_RESULT ATTR_NON_NULL_PTR_ARG(1);
				static uint8_t DCOMP_RNDIS_Host_NextRNDISInterfaceEndpoint(void* const CurrentDescriptor)
				                                                           ATTR_WARN_UNUSED_RESULT ATTR_NON_NULL_PTR_ARG(1);
			#endif
	#endif

	/* Disable C linkage for C++ Compilers: */
		#if defined(__cplusplus)
			}
		#endif

#endif

/** @} */

